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Um, no the engine would not have to run at 3,000. that's around their free-wheel speed. and to counteract the SE having very low torque, we just make the generator inclined for small torque(fewer coils).
Engines of this nature already power the SES Suncatcher in site 1 and site 2(under construction not sure if they have started erecting units yet). They run very low torque and very high RPM at 711 degrees C. This engine would run reasonably high rpm at 1000-1500 and low torque as well providing less HP(less than 33). keep in mind the suncatchers are employed in the desert for maximum sun, but they also have a very high background temperature(well over 100 for the 25 KW tests) and my avg temperature in the summer is less than 80 and the temperature in the winter is 30-40. So at both of those times I start off with an advantage because my engines will be much more capable of heat syncing on open air than theirs as well as a moderate temp difference(theirs is 700-120=580 mine would be ~400-60=340)=(20 hp not including increased heat syncing on cold side due to car speed or lower atmospheric temperatures.)
So roughly 20 HP for 50-60 lbs? What are the 5th wheel guys talking about? increased rolling resistance and huge amounts of weight for how many horsepowers? Also they aren't stripping out trans or several other weight contributors.
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